From 83a1dd9a044dcbab718d4eb1b3df753e6543364e Mon Sep 17 00:00:00 2001
From: Georg Hagen <git.georg.hagen@madvoxel.com>
Date: Mon, 1 Jul 2024 14:28:20 +0200
Subject: [PATCH] Add zoom

---
 openVulkanoCpp/Controller/MapCameraController.cpp | 12 ++++++++++++
 openVulkanoCpp/Controller/MapCameraController.hpp |  1 +
 2 files changed, 13 insertions(+)

diff --git a/openVulkanoCpp/Controller/MapCameraController.cpp b/openVulkanoCpp/Controller/MapCameraController.cpp
index 42150e3..a2c228b 100644
--- a/openVulkanoCpp/Controller/MapCameraController.cpp
+++ b/openVulkanoCpp/Controller/MapCameraController.cpp
@@ -15,6 +15,7 @@ namespace OpenVulkano
 		auto input = Input::InputManager::GetInstance();
 		m_actionUp = input->GetAction("map_up");
 		m_actionSide = input->GetAction("map_side");
+		m_actionZoom = input->GetAction("map_zoom");
 	}
 
 	void MapCameraController::Tick()
@@ -25,6 +26,15 @@ namespace OpenVulkano
 		vec /= GetCamera()->GetZoom();
 		vec /= GetCamera()->GetContentScaleFactor();
 
+		float zoom = Input::InputManager::GetInstance()->GetAxis(m_actionZoom);
+		if (zoom != 0)
+		{
+			float tmp = sqrt(GetCamera()->GetZoom()) + zoom / std::max(10.0f, (100 - GetCamera()->GetZoom()));
+			tmp = std::max(3.0f, tmp);
+			GetCamera()->SetZoom(tmp * tmp);
+			GetCamera()->UpdateProjectionMatrix();
+		}
+
 		GetCamera()->SetMatrix(Math::Utils::translate(vec) * GetCamera()->GetMatrix());
 	}
 
@@ -36,5 +46,7 @@ namespace OpenVulkano
 		m_actionSide->BindKey(Input::InputKey::Controller::AXIS_LEFT_X);
 		m_actionSide->BindKey(Input::InputKey::Touch::AXIS_PAN_X);
 		m_actionSide->BindKey(Input::InputKey::Mouse::AXIS_X);
+		m_actionZoom->BindKey(Input::InputKey::Mouse::AXIS_WHEEL_Y, 2);
+		m_actionZoom->BindKey(Input::InputKey::Touch::AXIS_PINCH, 0.2);
 	}
 }
diff --git a/openVulkanoCpp/Controller/MapCameraController.hpp b/openVulkanoCpp/Controller/MapCameraController.hpp
index 803f18a..24ff238 100644
--- a/openVulkanoCpp/Controller/MapCameraController.hpp
+++ b/openVulkanoCpp/Controller/MapCameraController.hpp
@@ -20,6 +20,7 @@ namespace OpenVulkano
 	{
 		Input::InputAction* m_actionSide;
 		Input::InputAction* m_actionUp;
+		Input::InputAction* m_actionZoom;
 
 		Math::Vector3f_SIMD m_dirUp;
 		Math::Vector3f_SIMD m_dirSide;